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【多选题】
三相交流电的相电压为220V，下列说法中正确的是（）A.
电源作Y接，负载作Y接，每相负载的电压为220V
B.
电源作Y接，负载作Δ，每相负载的电压为380V
C.
电源作Δ接，负载作Y接，每相负载的电压为127伏
D.
电源作Δ，负载作Δ接，每相负载的电压为220伏
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皮皮学刷刷变学霸
举一反三
【单选题】In general, elasticity is a measure of
A.
the extent to which advances in technology are adopted by producers.
B.
the extent to which a market is competitive.
C.
how firms’ profits respond to changes in market prices.
D.
how much buyers and sellers respond to changes in market conditions.
【单选题】In general, elasticity is a measure of_________.
A.
how much buyers and sellers respond to changes in market conditions
B.
the extent to which a market is competitive
C.
how firms ’ profits respond to changes in market prices
D.
the extent to which advances in technology are adopted by producers
【单选题】以下哪个选项不是顾客忠诚的表现
A.
对品牌所出的产品无理由的支持
B.
接受品牌一定幅度的涨价
C.
在产品降价时大量囤货
D.
当别的品牌推出相同或类似产品时抵制购买
【单选题】As for cross-border online business, the sellers cannot respond to buyers immediately due to different ____________, but the buyers can write e-mail to contact customer service.
A.
punctuality
B.
moment
C.
time zones
D.
memory
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